How to approach Carnot cycle via zeotropic working fluid: Research methodology and case study
How to approach Carnot cycle via zeotropic working fluid: Research methodology and case study
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如何通过非共沸工作流体实现卡诺循环：研究方法和案例研究
DOI：
10.1016/j.energy.2017.12.041
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发表时间：
2018-02
期刊：
影响因子：
9
通讯作者：
Yu Zhixin
中科院分区：
文献类型：
--
作者：
Xu Weicong;Deng Shuai;Su Wen;Zhang Ying;Zhao Li;Yu Zhixin
近年来，热力学循环的研究十分活跃，如有机朗肯循环（ORC）、卡林纳循环等。然而，这些研究的最终目的并没有随着对卡诺循环的不懈追求而改变，甚至可以追溯到一个多世纪以前。在现有的研究中，工质作为能量转换的介质，通常被认为在热力循环中起着重要的作用：（1）相对于理想循环，工程领域中的大多数实际动力循环都离不开工质;（2）能量效率，考虑第二定律效率分析，由于工质的引入，实际循环的能量效率有明显的下降。因此，工质是近年来热力循环研究的热点，非共沸混合工质通常由两种或两种以上的纯工质组成，具有热物性的灵活性，具有提高循环性能的潜力。在确定循环结构和部件设计时，应考虑非共沸混合物热物性的影响。提出了一种基于非共沸混合物的热力循环构造方法。在传统的温熵循环图的基础上，通过添加工质的热力学坐标，建立了一个三维循环图，用于循环性能分析。在此基础上，提出了一个由ORC子系统和组分调节子系统组成的基准循环，并讨论了该基准循环的组分调节技术。最后，对一个典型案例进行了简要描述，并总结了其特点。该工作为热力循环的节能设计提供了一种新的方法论视角。
A great amount of researches on thermodynamic cycles have been active in recent years, such as ORC (organic Rankine cycle), Kalina cycle, et al. However, the ultimate aim of such researches, which could even be traced back to more than one century ago, has not changed with a tireless pursuing to Carnot cycle. In exiting researches, the working fluid, as a medium for energy conversion, is commonly considered to play an important role in the thermodynamic cycle: (1) relative to ideal cycle, most of actual power cycles in the engineering field cannot operate without working fluid; (2) energy efficiency, considering the analysis of second-law efficiency, of actual cycle has a significant decrease due to the introduction of working fluid. Thus, working fluid is a hot spot in the research of thermodynamic cycle in recent years.Zeotropic mixture, which commonly consists of two or more pure working fluids, has flexibility in thermos-physical properties with a possible potential to enhance the cycle performance. The effects of thermos-physical properties of zeotropic mixture should be considered when determining the cycle structure and the design of components. This paper presents a novel construction method of thermodynamic cycle based on the zeotropic mixture. By adding the thermodynamic coordinate of working fluid, a 3D cycle diagram based on the traditional temperature and entropy cycle diagram is applied for performance analysis of cycle. According the proposed construction method, a baseline cycle, composed by ORC sub-system and compositions regulating sub-system, is put forward and available compositions regulating techniques for such cycle are discussed as well. Finally, a representative case is described briefly and the features are summarized. This work provides a new methodology view to guide researchers in energy-efficient design of thermodynamic cycles.
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DOI：
10.1016/s0140-7007(01)00110-4
发表时间：
2002-12
期刊：
International Journal of Refrigeration-revue Internationale Du Froid
影响因子：
--
作者：
S.G Kim;M.S Kim
通讯作者：
S.G Kim;M.S Kim
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影响因子：
10.4
作者：
Yang Xingyang;Zheng Nan;Zhao Li;Deng Shuai;Li Hailong;Yu Zhixing
通讯作者：
Yu Zhixing
影响因子：
6.4
作者：
Zishen Li;Weiyi Li;Bo Xu
通讯作者：
Zishen Li;Weiyi Li;Bo Xu
用于具有有机朗肯循环的微型热电联产系统的膨胀机
影响因子：
6.4
作者：
Qiu G
通讯作者：
Qiu G
提高有机朗肯循环系统性能的两级蒸发策略
影响因子：
11.2
作者：
Tailu Li;Zhigang Zhang;Jian Lu;Junlan Yang;Yujie Hu
通讯作者：
Yujie Hu